Life list

A life list, or life-list, is a list of all biological species seen by a person. The action of tracking which biological species one has observed is known as lifelisting. The phrase is particularly common among bird watchers and fishermen, though it can be applied to many animal types. Those who compile life lists may compete with each other to have the largest list with the most unique species.

Lifelisting can take many forms, as it is up to each individual what they "count" for their list and what they don't. Some birders will only count birds they see, while others might take a vocalization as evidence enough to add the species to their lifelist. In other cases, a birder might be in a group of people bird watching when only one person sees and identifies the bird, and the others may choose whether or not to add it to their list.

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